Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa95087bd03a518…

MALICIOUS

PDF

94.1 KB Created: 2021-06-29 00:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c89647b5d566c646968ec2e9fc5c1d50 SHA-1: 0f146ea453b961ec7ea958c0609274229ff533f0 SHA-256: 9fa95087bd03a51838fa5a758f68d033d0560471079e894d4c0198948d75aac1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous compromised WordPress sites and disposable hosting domains. These links likely serve as a distribution point for phishing or further malware, aligning with spearphishing attachment and malicious link attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://medvor.ru/uplcv?utm_term=science+trivia+questions+and+answers+for+elementary PDF link annotation
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b55f4acc5ff---zumutufukitite.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/weregamikexolusubetezika.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160806fb675a39---9432972819.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6a6a6b0fb---sadabofizufoxekavepirupo.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/e267241b557fb91487c76f60b3013d1e/94062402147.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/5e16c2ea25cefec9abed5347ae2c5a18/favuwoxomeviketuzebajiwa.pdfIn PDF document text
    • http://classtool.info/upload/files/52790777066.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608898e19963a---52564347251.pdfIn PDF document text
    • http://asustainable.com/global/file/kixosekatasifav.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a404f4488ac---98313454995.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/6ee62da63bc24a7248d1d7c586bd70fe/72963248965.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/kixumiwotezazanenizel.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/cc6c1975d81a83150b6238a67ec5fb57/vujaguxema.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/83019940187.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a11bbfc7662---38386009370.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/bunaxasomazudipo.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ri2en79p8e0r77ope20jl00er4/90816181961.pdfIn PDF document text
    • https://hgb.se/filer/file/rexuzolobari.pdfIn PDF document text
    • http://varanini.pl/userfiles/file/36470799201.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/41iqbjo3l2v596a2lmktq7ihj6/59646347748.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a718a7d53ea---ronexelovosakaj.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d80d28be73b---totavusukenapijitugofula.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/6092219828.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a77ab090c67980cd4bcfa413c2a2674/mawoxokidemi.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a15714e7ffd---gorexatopikuwivulisolo.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1522b0fc6---tugubarunupinexexibosuk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 17192 bytes
SHA-256: 0a48fc248fa2b6057dd70cd04ee93baa2f277cf16a7f5cc0899759f041be1312
font_01_sfnt_off0001386d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386D 11224 bytes
SHA-256: f6933e2e8a6e28117b99b4e7169d83836f2fdc4d42c62cac3b2738c5460f0c35
font_02_sfnt_off00015299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.